I have 8 Svetlana 6550 tubes. I am going to group them into 3 categories. I bought them from a friend who's getting out of the hobby and my amps are all Solid State. I have no use. They all came in GE boxes but are as advertised Svetlanas. I had no idea their condition so I had Antique Electronics in Tempe AZ grade and measure them.First tubes are 6 tubes which are old original Svetlana factory tubes. Antique called them NOS because each tube measures better than new. Scores are as follows:
50/48 51/48 50/48 50/48 54/48 59/48 Price is $80 each. Antique priced them between $130 and $140 each on the market. Second group is a Svetlana remake 6550 which scored 52/48 . Identified as a remake by the new Svetlana logo. $75 Third group is a RAM Svetlana 6550 which scored a 44/48 and 44/32. I don't know why this tube has two scores. $50 Antique did NOT check for Microphonics. Price is plus any fees (shipping / Paypal ) Remember these are in old GE boxes.
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